My cache drives report to have ~75GB that I can't seem to account for. The docker.img file is 80gb (the /system folder) and /appdata is mostly minecraft servers. I don't think I've ever used VMs which seem to often cause other people to have similar issues. Is there another command or setting I can use to locate/delete whatever is making the total reported used space be 374GB?

Thanks in advance

 

these 75Gb can be the overhead used by the btfrs file system itself. Unlike other OS's UNRAID does not count them in as granted but shows the net allocation (others silently lower the available freespace of the drive so you never see this part of allocation)

 

Docker and other images can also grow with time, try recreating the docker image, if it's not that, you can move the data to the array, and then move back to find out what it is,. btrfs defrag can also help, but only run it if you are not using snapshots.